Reti Opening Advance Variation Puzzle (Rated 1457): Win a Fork — Decisive Material Gain

This puzzle comes from a Reti Opening middlegame where White uses active piece placement to convert a positional edge into a tactical win. The key idea is a knight fork that hits two important targets at once, forcing the opponent into a defensive concession. In practical classical chess, these motifs often appear when one side has better piece activity, a cramped defender, and loose coordination around the center and queenside.